Improvement in last-machines



' UNIT-ED STATES PATENT OFFICE.

JASON W. TOWN, OF SOUTH WOODBURY, VERMONT.

IMPROVEMENT IN LAST-MACHINES.

Specification forming part of Letters Patent No. 39,847, dated September8, 1863.

T0 @ZZ whom t may concern:

Be it known that I, J. W. TOWN, of South Woodbury, in the county ofWashington and State of Vermont, have invented a new and usefulImprovement in Machines for Turning Shoe-Lasts, Ste.; and Ido herebydeclare that the following is a full` clear, and exact description ofthe same, reference heilig had to the accompanying drawings, making apart ot' this speciiication, in which- Figure l represents a sideelevation ot' my invention. Fig. 2 is a front elevation of the same.

Similar letters of reference indicate corresponding parts in the twofigures.

The invention relates to an improvement in the guide or model wheel ot'a graduating last machine, arranging the saine in such a manner thatwithout changing the cutters or pattern dii-ferent sizes of lasts can beproduced.

To enable others skilled in the artito irake and use my invention,l willproceed to describeit.

Last-machines of the ordinary construction have but one size of guide ormodel wheel, or a part of wheel, which, ot' course, correspondsin sizewith the knives on the cutting wheel. With this arrangement theproportion cannot be maintained perfectly, and in order to accomplishthis object it is indispensable there should be as many sizes of guidesas there are different sizes of lasts to be turned by one pattern ormodel last, each guide varying in size so as to bear the same proportionto the pattern or model last that the cutting-wheel does to the last tobe turned.

My invention therefore really consists in using, in a last-machine,different sizes of guides, and in order to have these guidesconveniently placed and easy to manage, I have secured them to theperiphery of a wheel, A, the middle of each guide a being locatedequidistant from the center of the arbor b, on which the wheel Arotates. The wheel A rests upon its gudgeons, and it should be locatedor. held in the desired position by a dog or pin inserted in one of theholes c in the side. It is turned by hand, and

that only when a different-sized last is to be turned. The guides arenumbered from 4 to l2, and they gradually decreasein size. They are,however, so arranged that the edge of the wheel remains even on one.side.

In using my guides I proceed as follows: For instance, if B representsthe model-last and O the last to be turned, D being the cutterhead, andif the model is a teninch one and right for a ten-inch cuttingwheel,with knives on a circle of one and one-half inch diameter, in order-toturn like the pattern, Whatever that maybe, the guide should be locatedwith with the middle section (No. 8) to the pattern. If it is nowdesired to turn a No. 9 last from a pattern No 8 mans last, Iwouldlocate the section No. 9 ot my guide-wheel to the pattern. This sectionis smaller in all its dimensions than the previous section and to turn aNo. 10 a still smaller guide is located toward the pattern butto turn alast smalh 1'V than the pattern a larger guide should be used in thesame order in which they are numbet-ed.

My guides are applicable to all graduating lastmachineswith but littlealteration in the other arrangements.

The variation in the width ofthe guides effects the length of the lasts,and by having them even on one side ot the wheel A the variation inlength will all be one way, and it is only necessary that the leverwhich governs the length nt' the lasts should be spaced and markedaccording to circumstances.

Vhat I claim as new, and desire to secure by Letters Patent, is-

1. The employment or use of diierent sizes of guides in a last-machine,so that with theV JASON W. TOWN.

Witnesses:

SIDNEY O. WELLS, ORLANDO M. GIBBs.

